Children of any religion who have true faith must realize that God is the only One who knows all of everything. Therefore, only God can judge whether a person has faith, certitude, and determination or not and whether a person lives with that purity that can be called Islam or not. No one else can give that judgment. Do not wave your religion like a banner and go out to capture others. Only one kind of war is permissible in the eyes of God: the war you wage within yourself to defeat the demonic forces of lust, anger, jealousy, desire for revenge, and other evil feelings and attributes that may exist within your heart. God has sent each of the prophets as witnesses to the grace of God and as supports to help us in this inner war. This is the reason for the Qur'an. It is to help the true Muslim fight this inner battle and win victory over his own base desires that God sent the Messenger with the Qur'an.